Mist oil lubricant

A lubricant composition suitable for mist lubrication consisting essentially of, by weight

• a) 90 to 95% of a base stock ester oil being an alkyl ester of a polycarboxylic acid selected from the group consisting of aromatic dicarboxylic acids having 8 to 14 carbon atoms, aliphatic dicarboxylic acids having 4 to 12 carbon atoms and cycloaliphatic dicarboxylic acids having 8 to 12 carbon atoms, the alkyl being straight or branched chain C5 to C18 alkyl, the ester oil having a viscosity of 10-150 cSt at 40.degree. C.;
• b) 3 to 5% of special purpose additive selected from the group consisting of rust inhibitors, corrosion inhibitors, anti-wear agents, anti-foam agents, antioxidants, demulsifiers, extreme pressure agents and mixtures of same, and
• c) as a stray mist suppressant, 1 to 5% of a polyisobutlene having a Mn of from about 400 to 2500.